Word: cardiac
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...majority of heart disease deaths occur before a patient reaches a hospital [June 1]. Significant improvement in the heart attack victim's survival rate has been reported when electrical treatment in conjunction with cardiopulmonary resuscitation was administered within eight minutes of cardiac arrest. Wide availability of a device enabling medically authorized lay people to give appropriate electrical treatment may have enormous life-saving potential...
Electrophysiology. At the University of Pennsylvania and several other institutions, cardiac electrophysiologists are investigating the heart's electrical conduction system to learn where abnormal beats originate and to develop appropriate treatment. They do this by inserting several narrow tubes containing electrodes to induce a faulty rhythm in the heart. Says Penn's Mark Josephson: "Using electrical stimulation of the heart and mapping, we can decide whether to use drugs, a pacemaker or surgery...
...flow of calcium ions into the muscle cells. Because of this, drugs that inhibit the flow of calcium ions have attracted intense interest. Declares Boston's Braunwald: "Calcium blockers are not just another class of drugs that has come along. They lower blood pressure, they raise cardiac output in heart failure, they are effective in arrhythmias. They are also useful for angina. They're almost too good to be true...
...result from a lifelong buildup of fatty deposits in the arteries that nourish the heart. If these coronary vessels become badly obstructed, the flow of vital blood and oxygen is reduced or cut off entirely. When that happens, parts of the heart are starved. It is the death of cardiac muscle that constitutes a heart attack...
...first minutes or hours after the attack, caused by irregularities in the flow of electrical signals that control the beat of the heart. The heartbeat may develop abnormal rhythms and degenerate into a useless twitching or quivering. No longer is the heart able to drive blood through the body. Cardiac arrest ensues...